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METHOD FOR PRODUCING HIGH-STRENGTH HIGH-TOUGHNESS ZrO2-Al2O3-BASED SOLID SOLUTION CERAMIC

外国特許コード F120007059
整理番号 S2011-0734-N0
掲載日 2012年11月28日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2012JP061196
国際公開番号 WO 2012/153645
国際出願日 平成24年4月26日(2012.4.26)
国際公開日 平成24年11月15日(2012.11.15)
優先権データ
  • 特願2011-107228 (2011.5.12) JP
発明の名称 (英語) METHOD FOR PRODUCING HIGH-STRENGTH HIGH-TOUGHNESS ZrO2-Al2O3-BASED SOLID SOLUTION CERAMIC
発明の概要(英語)

Provided is a method for producing a high-strength high-toughness ZrO2-Al2O3-based solid solution ceramic. Y2O3 in an amount of 0.3-1.7 mol% is added ZrO2 employing a sol-gel method to prepare an amorphous ZrO2-(20-30 mol% Al2O3) solid solution powder, and the resultant amorphous solid solution powder is pre-sintered at a temperature equal to or higher than a crystallization temperature, thereby preparing a crystalline ZrO2 solid solution powder (step A). The resultant crystalline ZrO2 solid solution powder is molded, and the molded product is then sintered in an inert gas atmosphere under the conditions of a temperature rising rate of 50 C/min or more, a pressure of 30-100 MPa and a sintering temperature of 1250-1350 DEG C for 3-30 minutes (step B). In this process, it is preferred to perform the molding in the step B by means of cold isostatic press and perform the sintering by a pulse current pressure sintering method or a spark plasma sintering method in an argon or nitrogen gas atmosphere.

  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • THE DOSHISHA,
  • HIROTA, KEN,
  • SATO, HIDEYUKI,
  • SHIBAYA, KENGO
  • 発明者(英語)
  • HIROTA, KEN,
  • SATO, HIDEYUKI,
  • SHIBAYA, KENGO
国際特許分類(IPC)

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